Donor-bound electron states in a two-dimensional quantum ring under uniform magnetic field
The electron states in a two-dimensional GaAs/AlGaAs quantum ring are theoretically studied in effective mass approximation. On-centre donor impurity and uniform magnetic field perpendicular to the ring plane are taken into account. The energy spectrum with different angular momentum changes dramati...
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| Published in | Chinese physics B Vol. 20; no. 6; pp. 392 - 396 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
IOP Publishing
01.06.2011
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-1056 2058-3834 |
| DOI | 10.1088/1674-1056/20/6/067301 |
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| Abstract | The electron states in a two-dimensional GaAs/AlGaAs quantum ring are theoretically studied in effective mass approximation. On-centre donor impurity and uniform magnetic field perpendicular to the ring plane are taken into account. The energy spectrum with different angular momentum changes dramatically with the geometry of the ring. The donor impurity reduces the energies with an almost fixed value; however, the magnetic field alters energies in a more complex way. For example, energy levels under magnetic field will cross each other when increasing the inner radius and outer radius of the ring, leading to the fact that the arrangement of energy levels is distinct in certain geometry of the ring. Moreover, energy levels with negative angular momentum exhibit the non-monotonous dependence on the increasing magnetic field. |
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| AbstractList | The electron states in a two-dimensional GaAs/AlGaAs quantum ring are theoretically studied in effective mass approximation. On-centre donor impurity and uniform magnetic field perpendicular to the ring plane are taken into account. The energy spectrum with different angular momentum changes dramatically with the geometry of the ring. The donor impurity reduces the energies with an almost fixed value; however, the magnetic field alters energies in a more complex way. For example, energy levels under magnetic field will cross each other when increasing the inner radius and outer radius of the ring, leading to the fact that the arrangement of energy levels is distinct in certain geometry of the ring. Moreover, energy levels with negative angular momentum exhibit the non-monotonous dependence on the increasing magnetic field. |
| Author | 贾博雍 俞重远 刘玉敏 韩利红 姚文杰 冯昊 叶寒 |
| AuthorAffiliation | Key Laboratory of Information Photonics and Optical Communications （Ministry of Education）, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| CitedBy_id | crossref_primary_10_1016_j_physb_2014_11_093 crossref_primary_10_1016_j_physb_2012_07_004 crossref_primary_10_1088_1674_1056_21_12_120303 crossref_primary_10_1016_j_spmi_2013_12_027 crossref_primary_10_1088_1674_1056_22_4_048701 |
| Cites_doi | 10.1063/1.2089165 10.1103/PhysRevB.72.205301 10.1088/1674-1056/18/11/010 10.1103/PhysRevB.77.125404 10.1103/PhysRevLett.101.256101 10.1088/0268-1242/17/5/103 10.1063/1.3075836 10.1103/PhysRevB.75.115303 10.1063/1.1566799 10.1016/j.mejo.2007.07.063 10.1088/0965-0393/17/3/035004 10.1103/PhysRevLett.98.166102 10.1063/1.1616992 10.1063/1.119772 10.1103/PhysRevB.76.073312 10.1063/1.3069281 10.1103/PhysRevB.66.035311 10.1103/PhysRevB.79.085308 10.1103/PhysRevB.79.153305 10.1088/1674-1056/17/8/047 10.1140/epjb/e2005-00384-y 10.1088/0957-4484/15/4/003 10.1103/PhysRevB.78.245306 10.1021/nl048192+ 10.1002/pssb.200844349 10.1016/j.physe.2005.12.091 10.7498/aps.59.8843 |
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| Notes | quantum ring, electron state, donor impurity, uniform magnetic field The electron states in a two-dimensional GaAs/AlGaAs quantum ring are theoretically studied in effective mass approximation. On-centre donor impurity and uniform magnetic field perpendicular to the ring plane are taken into account. The energy spectrum with different angular momentum changes dramatically with the geometry of the ring. The donor impurity reduces the energies with an almost fixed value; however, the magnetic field alters energies in a more complex way. For example, energy levels under magnetic field will cross each other when increasing the inner radius and outer radius of the ring, leading to the fact that the arrangement of energy levels is distinct in certain geometry of the ring. Moreover, energy levels with negative angular momentum exhibit the non-monotonous dependence on the increasing magnetic field. Jia Bo-Yong, Yu Zhong-Yuan, Liu Yu-Min, Han Li-Hong, Yao Wen-Jie Feng Hao, and Ye Han（Key Laboratory of Information Photonics and Optical Communications （Ministry of Education）, Beijing University of Posts and Telecommunications, Beijing 100876, China） 11-5639/O4 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 |
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| References | 22 23 Liu Y M (15) 2009; 18 25 26 27 Wu H (14) 2010; 59 Jia B Y (17) 2009; 17 Feng S L (18) 2008; 17 Suárez F (7) 2004; 15 10 11 12 13 16 19 1 2 3 4 Keyser U F (24) 2002; 17 Levinshtein M (28) 1999 5 6 8 9 20 21 |
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| SubjectTerms | AlGaAs Aluminum gallium arsenides Angular momentum Electron states Energy levels Gallium arsenide Impurities Magnetic fields Two dimensional 几何形状 均匀磁场 子环 施主杂质 有效质量 电子态 能量水平 |
| Title | Donor-bound electron states in a two-dimensional quantum ring under uniform magnetic field |
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